This article is cited in 3 papers

Thermophysical Properties of Materials

Thermal conductivity of $\rm CuGaTe_2$ and $\rm CuInTe_2$ ternary compounds in the temperature range of $300$–$800$ K

Sh. M. Ismailov^a, Z. A. Isaev^b, S. M. Orakova^ab, Kh. Sh. Yakh'yaeva<sup>b

a</sup> Daghestan Institute of Physics after Amirkhanov
^b M. M. Dzhambulatov Dagestan State Agricultural University, Makhachkala

Abstract: The thermal conductivity of $\rm CuGaTe_2$ and $\rm CuInTe_2$ was measured at high temperatures $(300$–$800$ K$)$. The potential mechanisms of heat transport are analyzed. The total thermal conductivity of the examined compounds in the studied temperature range is completely determined by the thermal conductivity of the crystal lattice $\lambda_{\rm lat}$. It is demonstrated that the thermal conductivity of the crystal lattice changes with temperature faster than with $\lambda_{\rm lat} \sim T^{-1}$. The potential causes of the deviation of the thermal conductivity of the crystal lattice from the Eucken law are considered.

UDC: 536.21

Received: 28.02.2019
Revised: 19.06.2019
Accepted: 19.06.2019

DOI: 10.1134/S0040364419060115

 English version: High Temperature, 2019, 57:6, 832–836

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